pef22504 Infineon Technologies Corporation, pef22504 Datasheet - Page 65

• Manufacturer Part Number: pef22504
• Description: Quad E1/t1/j1 Line Interface Component For Long- And Short-haul Applications Pef 22504 E, Pef 22504 Ht, Version 2.1
• Manufacturer: Infineon Technologies Corporation

3
3.1
The QuadLIU
the 1.8 V supply being generated internally by an on-chip regulator, see
dissipation, it is recommended to operate the device using separate external 3.3 V and 1.8 V supplies. Please note
that the 1.8 V supply requires de-coupling whether generated on-chip or externally. Supply voltage selection is
done by the pin VSEL.
The pin IM1 is used to select the additional serial interfaces SPI and SCI bus, see also
The pin READY_EN can be used to activate the output functionality of the additional pin READY/ DTACK. for the
asynchronous micro controller interface. Because the READY_EN pin is used for V
READY/ DTACK is not active (is in tri-state mode) if no change is made on the board. Therefore for the READY/
DTACK pin also no change must be made on the board. See also
Some pins of the micro controller interface have different functions if the SPI or SCI bus is selected as interface
to the micro controller.
The pins RLAS2(1:4) of the additional separate analog switches at the receive line interfaces (supported only in
P/PG-LBGA-160-1 package) can be connected to VSSX if the analog switches are not used.
To accommodate the package several signals can be configured at the multifunction ports. Four multifunction
ports exist for the receive direction and four for the transmit direction for each of the four channels.
Figure 7
Data Sheet
V
must always be guaranteed,
also during power on and
power down sequences.
DD
, V
Functional Description
Hardware
Single Voltage Supply
TM
DDP
requires either two supply voltages, 1.8 V and 3.3 V, see
, V
DDX
, V
DDR
> V
DDC
3.3 V
65
Chapter
V
V
V
V
V
V
V
V
V
V
DDP
DDC
DDC
DD
DDX
DDR
SS
SSP
SSX
SSR
QuadLIU
Figure
Figure
3.5.1.
8, or a single 3.3 V supply, with
VSEL
7. In order to minimize power
SS
Chapter
Functional Description
(can be left
open)
QLIU_F0248
in version 2.1, the pin
3.3 V
Rev. 1.3, 2006-01-25
2.5.
QuadLIU
PEF 22504
TM